Cock.



NO. 685,597. Patented Oct. 29, I90l.

H GIBBS (Ap led Jul (No Model.)

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HENRY GIBBS, OF CHICAGO, ILLINOIS, ASSIGNOR TO W. D. ALLEN MAN UFAC- TURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION.

COCK.

SPECIFICATION forming part of Letters Patent No. 685,597, dated October 29, 1901.

Application filed July 2, 1901.

T aZZ whom it may concern:

Be it known that I, HENRY GIBBS, a resident of Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Cocks, of which the following is a full, clear, and exact description.

This invention has for its object to provide a simple, durable, and effective construction of cock that cannot be tampered. with; and the invention consists in the features of improvement hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the claims at the end of this specification.

It is customary to provide the pipes that lead from the air-compressors to the air-drills used in mining operations with cocks,whereby the flow of air can be controlled by the operators of the drills. The most common form of cocks used for this purpose is one in which the Valve extends through the casing and is provided at its lower end with an adjustingscrew, by which the lit of the valve to its seat can be regulated. One serious objection to this old style of cock is that the operators in order to get more air in the space in which they are working are in the habit of loosening the tension-nuts at the bottom of the valves, so as to permit the leakage of air through the casing and around the valve. It thus happens not only that the nuts are frequently lost and the valves soon become unfit for use, but it is found that an unnecessary burden is placed upon the compressors in supplying far more air than is required for the operation of the drills.

By my present invention a cock is provided which, while readily controllable by the op erator in working the drill, cannot be loosened or tampered with, so as to allow the leakage or escape of the air, as with prior constructions.

Figure 1 is a view in side elevation of a cock embodying my invention. Fig. 2 is aview in central vertical section on line 2 2 of Fig. 1. Fig. 3 is aplan view of the handle of the cock removed.

A designates the body of the valve-casing, 5e that is provided with the usual threaded necks Serial No. 66,838. (No model.)

a for attachment to the couplings of the hose. The interior of the casing A is formed with a seat, preferably tapered, to receive the valve B, this valve being provided with the usual port I) for passage of air therethrough. The bottom a of the'casing that receives the lower end of the valve B is closed and will be slightly deeper than the lower end of the valve. The top of the casing A is formed with a neck or chamber a having an in- Wardly-extending offset or flange a against which will bear 0ne.end of a coil-spring C. The opposite end of this spring 0 will bear against the shouldered portion 1) of the valve B, and the spring C will thus hold the valve firmly to its seat. The reduced portion or stem 19 of the valve Bis shown as of smaller diameter than the flange or offset 61 so as to permit the spring C to be sprung into place.

. Preferably a cap D, having an opening to receive valve-stem b is set over the neck or chamber a and, as shown, this cap D is provided with an interiorly-threaded flange d to engage the correspondingly-threaded portion of the neck or chamber 00 The upper end of the valve-stem b is shown as squared to receive a handle E, that may be connected thereto by a pin e, that passes through the handle and the stem of the valve.

In placing the parts together the valve B will be first set onto the seat within the casing A. The spring C will then be sprung into position, (shown in Fig. 2 of the drawings,) so that one end of the spring bears against the offset or flange 00 while the other end bears against the shouldered portion of the valve and serves to hold the valve snugly to its seat. The cap D will then be set over the valve-stem and will be screwed to place, after which the handle E will be fixed upon the 0 squared end of the valve-stem. The spring 0 is preferably a strong steel spring, thus serving to resist the displacement of the valve, and so long as the spring is in position shown the valve is held to its seat, even if'the cap 5 D be removed. Indeed, the cap is not essential, although its presence is desirable in or-' der to exclude dust from the valve-casing. The operator by turning the handle E can readily control the flow of air through the cock, butis unable to loosen the valve in such manner as to permit a leakage of air around the valve and through the casing, as with cocks of prior construction. Indeed, in the preferred form of the invention the spring 0 is so stiff that it would be a somewhat difficult matter withoutproper tools to withdraw the spring from beneath the offset or flange a and if he succeeded in doing this the valve would blow out and the cock would be rendered inoperative.

It is manifest that the precise details of construction above set out may be varied without departure from the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A cock comprising a casing having fluidports and a valve-seat, a valve Within said casing and a stiff spring interposed between an integral part of the casing and said valve to hold the latter in place upon its seat and to prevent tampering therewith.

2. A cock comprising a casing having fluidports and a conical valve-seat, a rotatable conical valve within said casing and a stiff coil-spring interposed between an integral part of said casing and the larger end of said valve to hold the latterin place upon its seat and to prevent tampering therewith.

3. A cock comprising a casing having fluidports and a valve-seat-therein and having an internal flange or offset below the top of the casing and above said valve-seat, a valve within said casing and having a shoulder or ofiset at its top and a spring interposed between the offset of the casing and the offset of the valve to retain the valve in place within its seat.

4. Acock comprising a casing having fluidports and a valve-seat, and having an internal flange or offset above said valve-seat, a valve Within said casing and having a shoulder or ofiset at its top of less diameter than said internal flange or offset of the casing and a spring interposed between the offset of the casing and the oifset of the valve to retain the valve in place upon its seat.

5. A cock comprising a casing having fluidports and a valve-seat therein and having an internal inwardly-extending flange or offset below the top of the casing and above said valve-seat, a valve within said casing and having a reduced stern, a coiled spring encircling said valve-stem and interposed between the top of the Valve and the inwardlyextending offset or flange of the casing to retain the valve in place upon its seat.

6. A cock comprising a casing having fluidports and a valve-seat therein, said valve-seat being closed at its bottom and having an inwardly-extending flange at a distance above said valve-seat, a valve within said casing and havinga reduced stem and a coiled spring encircling said valve-stem and interposed between said annular fiange of the casing and the top of the valve to retain the valve in place upon its seat.

7. A cock comprising a casing having fluidports and a valve-seat therein and having a flange or offset above said valve-seat, a valve within said casing and havinga reduced stem, a coiled spring encircling said valve-stem and interposed between the offset of the easing and the valve and a cap encircling the valve-stem and closing the space between said stem and the casing.

8. Acock comprising a casing having fluidports and a valve-seat therein and having a flange or offset above said valve-seat, a valve within said casing and havinga reduced stem, a coiled spring encircling said valve-stem and interposed between the offset of the casing and the valve and a cap encircling said valve-stem and having an interiorly-threaded flange engaging the correspondingly-threaded part of the casing.

HENRY GIBBS lVitnesses:

ALBERTA ADAMICK, GEO. I. FISHER, Jr. 

